Pencil with lead shiftable and fixable by a sliding sleeve



March 24, 1931. R w HAACK 1,797,723

PENCIL WITH LEAD SHIFTABLE AND FIXABLE BY A SLIDING SLEEVE Filed May 26,1930 lnven for:

latented Mar. 24, 1931 UNITED sTAT'Es PATENT OFFICE rmnnmon WILHELMHAACK, or BERLIN, GERMANY PENCIL WITH LEAD SHIFT-ABLE AND FIXABLE BY ASLIDING SLEEVE Application filed. May 26, 1930. Serial No. 455,937.

' This invention relates to a pencil with a lead shiftable and fixableby a slidable sleeve. These pencils consist of a case with longitudinalslot, in which the lead is situated and fastened on an arm projectingfrom the longitudinal slot. This arm terminates in a slidable sleeve,surrounding the case, which enables the lead to be shifted from theouter side. The object of the invention is to secure the sliding sleevein any desired position.

For this purpose round keys are known, which project from a square holeof the m tatable ring encircling the slidable sleeve. Otherconstructions show instead of thesquare hole-a groove in the rotatablering,

, which on being turned is pushed over the key slot of the pencil andcarrying the ead. In

these devices the key is soon pressed fiat and worn down, besides whichthe square hole or groove soon widens so that often, after being used acertain time, the slidable sleeve is no longer clamped with the leadmoved thereby.

This objection'is overcome, according to the invention, in that on thesides of the slot in the pencil case clamping cheeks are provided. whichare formed by bending over or the like of the flaps of the bead bandtowards the in- 0 side on the entire length of the flaps and that thefixing ring has an eccentric groove, with which it engages over theclamping cheeks and one of which clamps against the pencil case on thering being turned to the right or to the'left. j

An embodiment of the invention is illustrated by way of example in theaccompanying drawing in which:

Fig. 1 shows the double sided beaded band 40 with the lead holder inperspective view.

Fig. 2 is an end view of the eccentric ad justing ring. a

Fig. 3 is a section on line,33 of Fig. 2. Fig. 4 shows a section on lineof Fig. 5.

Fig. 5 shows the pencil in elevation.:

a is the adjusting ring on the pencil case 6 having a slot 6'. Aneccentric groove '0 is provided in said ring. Between the pencil case band the adjusting ring a, a single or double sided beaded band d, 6 withflaps f is situated in the slot d. f'he edges of the flaps f are foldedinwards on their whole length so that they form clamping checks 9. Theclamping cheeks 9' engage in the eccentric groove 0 of the ring a. Thejoint between the flaps f and the clamping cheeks g is smooth on theinner side of the adjusting ring a. In the rounded portion 03 of thebeaded band the holding band 2' for the lead is fitted.

By turning the adjusting ring a to the right or to the left, one of theclamping cheeks g is pressed against the pencil case b so that theadjusting ring and thereby the pencil-is clamped. v I claim:

' A pencil, comprising in combination a pencil case having alongitudinal slot, a beaded hand, flaps on said band folded inwards ontheir entire length forming clamping cheeks at the sides of said slot,and an adjusting ring having an eccentric groove adapted to engage withsaid clamping cheeks, one of said cheeks adapted on the lateral turningof said ring to the right or to the left to clamp against said pencilcase. In testimon whereof I aifix my signature.

FRIEDR CHFVILHELM HAAOK.

